Written by the people responsible for designing and maintaining AT&T's Internet gateway, this book has become the definitive description and practical guide to protecting networks from hacker attacks through the Internet. The book shows how to set up a "firewall" gateway--a dedicated computer equ...

Written by the people responsible for designing and maintaining AT&T's Internet gateway, this book has become the definitive description and practical guide to protecting networks from hacker attacks through the Internet. The book shows how to set up a "firewall" gateway--a dedicated computer equipped with safeguards that acts as a single, more easily defended Internet connection.